On Sun, Jan 16, 2022 at 02:39:04PM +0100, ابو الغيث عليّ wrote: > Hello Thomas, > > What is the difference between Yacc and Lex GNU tools. > And Byacc or Bison?!
bison has a lot of non-yacc extensions. I don't believe any third-party has made a list of differences. Consider this like the difference between pmake and "gmake". > Berkeley still a source of truthful tools and clean mainstream. "Berkeley" is long out of the picture. The various BSDs package both byacc and bison. I see byacc here: MacOS base has this, which isn't the original byacc 1.9, but rather a copy of what was in NetBSD: https://opensource.apple.com/tarballs/yacc/ but ports have this byacc: https://github.com/macports/macports-ports/blob/master/devel/byacc/Portfile https://formulae.brew.sh/formula/byacc (fwiw, Apple rarely updates tools such as this except as required for POSIX certification). FreeBSD has this byacc both in base and ports: https://svnweb.freebsd.org/base/head/usr.bin/yacc/ https://svnweb.freebsd.org/ports/head/devel/byacc/ NetBSD has retired their copy of byacc 1.9 http://cvsweb.netbsd.org/bsdweb.cgi/src/usr.bin/yacc/?only_with_tag=MAIN in favor of this byacc: https://pkgsrc.se/devel/byacc OpenBSD has only byacc 1.9 copied from NetBSD, with minor changes: https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/yacc/ (fwiw, OpenBSD's ports are a subset of pkgsrc, e.g., 9453 vs 18329). There's also DragonFly (also using this byacc): https://gitweb.dragonflybsd.org/dragonfly.git/blob/HEAD:/usr.bin/yacc/Makefile https://gitweb.dragonflybsd.org/dragonfly.git/tree/HEAD:/contrib/byacc > Do it keep byacc and blex. there's a similar story for lex, but I think that's off-topic. > Kind regards, > > > > > > > > > On Sun, 16 Jan 2022 at 14:09 Thomas Dickey <dic...@his.com> wrote: > > > On Sun, Jan 16, 2022 at 07:58:07AM -0500, Thomas Dickey wrote: > > > On Sun, Jan 16, 2022 at 08:03:14AM +0100, Andreas Metzler wrote: > > ... > > > > * Is the double compilation/binary necessary? - Is /usr/bin/byacc2 > > > > > > I thought it would be the safest approach. I've made some effort to keep > > > the two compatible, but sooner or later will get some bug report related > > > to their differences. Debian's the usual place for that sort of thing. > > > > fwiw, the reference files in test/*yacc show that backtracking doesn't > > simply _add_ definitions: > > > > 155 files changed, 53852 insertions(+), 1785 deletions(-) > > > > (presumably reviewing those deletions would tell me whether two binaries > > are still needed). > > > > -- > > Thomas E. Dickey <dic...@invisible-island.net> > > https://invisible-island.net > > ftp://ftp.invisible-island.net > > -- Thomas E. Dickey <dic...@invisible-island.net> https://invisible-island.net ftp://ftp.invisible-island.net
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